Transition between Kerr comb and stimulated Raman comb in a silica whispering gallery mode microcavity

Shun Fujii, Takumi Kato, Ryo Suzuki, Atsuhiro Hori, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We theoretically and experimentally investigated the transition between modulation instability and Raman gain in a small silica microcavity with a large free-spectral range, which reveals that we can selectively switch from a four-wave mixing dominant state to a stimulated Raman scattering dominant state. Both the theoretical analysis and the experiment show that a Raman-dominant region is present between transitions of Kerr combs with different free-spectral range spacings. We can obtain a stable Kerr comb and a stable Raman state selectively by changing the driving power, coupling between the cavity and the waveguide, and laser detuning. Such a controllable transition is achieved thanks to the presence of gain competition between modulation instability and Raman gain in silica whispering gallery mode microcavities.

Original languageEnglish
Pages (from-to)100-106
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume35
Issue number1
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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